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TC682EOA Datasheet(PDF) 1 Page - TelCom Semiconductor, Inc |
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TC682EOA Datasheet(HTML) 1 Page - TelCom Semiconductor, Inc |
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1 / 6 page  4-21 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 INVERTING VOLTAGE DOUBLER FEATURES s 99.9% Voltage Conversion Efficiency s 92% Power Conversion Efficiency s Wide Input Voltage Range ............... +2.4V to +5.5V s Only 3 External Capacitors Required s 185 µA Supply Current s Space-Saving 8-Pin SOIC and 8-Pin Plastic DIP Packages APPLICATIONS s – 10V from +5V Logic Supply s – 6V from a Single 3V Lithium Cell s Portable Handheld Instruments s Cellular Phones s LCD Display Bias Generator s Panel Meters s Operational Amplifier Power Supplies GENERAL DESCRIPTION The TC682 is a CMOS charge pump converter that provides an inverted doubled output from a single positive supply. An on-board 12kHz (typical) oscillator provides the clock and only 3 external capacitors are required for full circuit implementation. Low output source impedance (typically 140 Ω), pro- vides output current up to 10mA. The TC682 features low quiescent current and high efficiency, making it the ideal choice for a wide variety of applications that require a negative voltage derived from a single positive supply (for example: generation of – 6V from a 3V lithium cell or – 10V generated from a +5V logic supply). The minimum external parts count and small physical size of the TC682 make it useful in many medium-current, dual voltage analog power supplies. TC682 PIN CONFIGURATIONS ORDERING INFORMATION Part No. Package Temp. Range TC682COA 8-Pin SOIC 0 °C to +70°C TC682CPA 8-Pin Plastic DIP 0 °C to +70°C TC682EOA 8-Pin SOIC – 40 °C to +85°C TC682EPA 8-Pin Plastic DIP – 40 °C to +85°C TC7660EV Evaluation Kit for Charge Pump Family GND + – + – + GND C2 + C2 – C1 + C1 C2 C1 – VIN VIN VOUT VOUT IN V = – (2 x V ) OUT All Caps = 3.3 µF COUT TC682 +2.4V < VIN < +5.5V TC682-2 8/21/96 TYPICAL OPERATING CIRCUIT 18 27 36 45 TC682CPA TC682EPA GND VOUT C2 – C1 – C2 + C1 + NC NC VIN 18 27 36 45 TC682COA TC682EOA GND VOUT C2 – C1 – C2 + C1 + VIN 8-Pin DIP 8-Pin SOIC EVALUATION KIT AVAILABLE |
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